Any methods for valuing ISOs vs Salary?

Is there any way for people to value an ISO relative to a salary increase? I know if someone offered me $10k to my salary or $10k in ISOs, I would take the salary every time. But I'm not sure where the break even point is, and not really sure how to come up with a number behind it.

I was hoping there may be some articles or something on the topic, but I couldn't find any. Hoping to learn for some upcoming salary negotiations, so thanks for any help!

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